Humidifier



FIG. 1 is a front perspective view showing the new design;

FIG. 2 is a front elevation view thereof, the opposite side being a mirror image;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right side elevation view thereof; and,

FIG. 6 is a left side elevation view thereof.

The broken line showing of environmental structure in FIGS. 1-6 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a humidifier, as shown and described. 